SCOPE-EXTENT OF VALIDITY OF RULES

摘要

The number of machine troubles is increasing in recent days. Often causes of them look very primitive: they are careless mistakes at the designing, manufacturing and usage. Vast application of computers in jobs for green engineers could be the root of troubles or it could be that they could not consider actual situations well, because it is not written in manuals. In the field of technology concerning functional machine elements, most difficult works could not be well done based only on the established simple procedures written in manuals. On the other hand, application of computers and data processors is necessary to carry out complicated jobs. Unthinking works using data processors on a large scale, such as in developing simulations for phenomena, might produce uncertain results that cost a huge amount of money. It is concluded that the capability to see and evaluate an object and its surroundings well is the most important.